Tamping machine



y 21, 1.929- J. F. BRENNAN ET AL 1,714,345

TAMP ING MACHI NE Filed July 18 1928 3 Sheets-Sheet 1 anon W1 y 21{1929 J. F. BRENNAN ET AL 1,714,345

TAMPING MACHINE Filed July 18, 1.928 3 Sheets-Sheet 2 y 21, 1929- J. F. BRENNAN ET AL Q 1,714,345

TAMPING MACHINE Filed July 18, 928 S Sheets-Sheet 3 Patented May 21, 1929.

UNIT ED P'ATYE NTf OFFICE; 1

JOHN F.-

AND err-Auras w. 'KREHER, OF NEW ORLEANS, LouIsIAN-a.

' TAMPING, MACHINE.

Applicationfiled Ju1y'18, ,1928;"Serial-No. 293,746;

This invention relates to atamping' ma.-

chines adapted to periodically elevate and release atamping element therefor.

An object of the invention 'comprehends a carriage for the mechanismv by means of which the apparatus may' be disposed directly over. the work to be tamped.

An additional object of the invention contemplates a swinging mountingfor thefapparatus whereby, the same may be shifted from the sides of the carriage without necessitating a changeinthe positionof the latter.

More specifically stated'the apparatus is provided with a clutch mechanism'by means of which the operating device may be thrown into and out of engagement with the tamping element.

A cardinal object of the invention resides in. the provisionof holding elements for the tamping element to sustain samefin an elevated position while the carriage is being moved to another location. I,

With the above and other objects in view, the invention further consistsin thefollowing novel features and details of construction, tov be hereinafter. more fully described, 'il'lustratedin the accompan ing drawings and pointed; out in the appen ed claims." I

In the'draw'ings v v i c Figure 1 is aside elevation of the invention. V

Figure 2 is a top plan view thereof. Figure 3 is a front elevation of the invention. c P I Referring to the drawings in. detail, where in. like characters of reference denote cor-v responding parts, the reference characterslO and llindicate side channelbars adapted to be seated upon the upper sides of frontand rearaxles 12 and13 respectively. WVheels 14 are journaled upon the outermost ends of said axles. Tie rods 15, having connection with spindle arms-16, carrying the wheels connected slightly in advance of the adjacent wheels.

in Figure 2 of the drawings;

A supporting or base plate rollers 22 journaled-between spaced parallel upon the aide 1-2,.substa-i1tially asill-ustrated 21, having 7 disposed plate members 23 carried uponv the underside thereof, are adapted to dispose their lowermostendsupon the opposite sides- 11, are adapted to support a block bearing or other spacing element, such-as, indicated at 25, upon the upper sides thereof ,andwhich is centrally apertured to-receive a boltmenr ber 26 therethrough carried by the base plate I 21 extended between the adjacent sidesof the channel bars 24. -A compression spring 27-,

carried upon the lower end ofthe bolt mem-.

ber 26 behind the nut 26 therefor, is adapted to engage the underside of. a plate member 29' carried upon the undersides of Qthe horizontally disposed channel bars 24, whereby the base plate 21- will be yieldingly retained in position for use. i I A sleeve 30, vertically disposed upon the 7 upper side and centrally of the base plate 21 in advance of the track 20,tis adapted to accommodate a plunger rod 31 having a socket 32 within the lowermost end thereof; vA

tamping element, such as indicated at 33,

having an upstanding trunnion 34 projected Within a socket opening 32,is held; againstdisplacement therein through the instru mentality of asset screw or other'locking ele-' ment 35.

Gusset plates 36, having' connection with the opposite and outer sides of the sleeve 30, are extended rearwardly thereof upon the upper side of. the base plate 21:

' An electric motor, gasoline motor'or other r. source of power or vprimemover, such as'in dicated at 37 upon-the upper side ofv the base plate 21,is provided with a driving gear 38,

adaptedforidriving connection with achain 39 trained over a driven gear 40. journaled between the gusset plates 36. A pinion gear 41, operable inconjunction with the driven gear 40, is adapted for meshing engagement with a relatively large gear 42 loosely mounted upon a shaft member 43 and jour-V naled between the respective gusset plates 36. The gear 43 carries a drum or cam face 44 upon its outer side operable by a clutch lever 46 carried upon the shaft 43.

Spaced driving sprockets 47, fixed upon the shaft 43 adjacent the inner side of the plunger rod 31, are adapted for connection with pairs of chains 48 which also travel over idler and adjusting sprockets 49 and 50 respectively.

Lifting elements, in the nature of plates 51, horizontally disposed and formingthe means of connection between the respective chains 48 and disposed at intervals thereon, are adapted for selective engagement with studs 52 ar A ratchet gear 53, carried by the shaft 48, is adapted for engagement with a pawl or dog 54, carried by the sleeve 30, whereby the plunger shaft 31 may be held in the position shown in Figure 1 of the drawings, while the carriage is being moved about from place to place. r

A handle member 55, carried upon the forward end of the base plateQl, may be employed for laterally shifting the same from its pivot point to move across the track 20 therefor, whereby the tamping element 33 may be disposed in position for use across a road bed or a ditch being filled. V

The adjusting sprockets 50 may be employed. to take up slack in the chains 48 and which in like manner to the idler sprockets 49 are arranged between plate members 56 raised adjacent the uppermost ends and opposite" sides of the sleeve 30.

Although I have described the present invention as being primarily adapted for use in the tamping of ditch fillings, road ballasts and the like, it is obviously understood that I do not limit myself to'the embodiment of the invention described but that thesame may be equally and effectually as Well applied for other uses.

The invention is susceptible of various changes in its form, proportlons and minor details of construction, and the right is here in reserved to make such changes as properly:

fall withinthe scope of the appended claims.

Having thus described the invention, what riage having a track upon one end thereof,

a supporting plate pivotally mounted at one end upon thecarriage and slidably mounted at its opposite end upon the track, a lifting apparatussupported upon the plate, a plunger shaft slidably mounted adjacent the sliding end of the plate, studs carried by the shaft, and means operable by the lifting apparatus to periodically engage, elevate and release said studs.

2. A tamping machine comprising a carriage having a curved track upon one end, a supporting plate pivoted at one end upon the track and slidably mounted at its other end upon said track, a sleeve vertically disposed upon the slidably mounted end of the plate,

a plunger shaft carried therein, a lifting ap-- paratus carried upon the base plate, chain members operable by the lifting apparatus, studs horizontally disposed upon one side and adjacent the uppermost end of the plunger shaft, plate members having connection at their ends with said chains and arranged at spaced intervals in the lengths thereof for selective engagement with said studs to periodically elevate and release said studs, and a tampingelei'nent carried upon the lowermost end of the plunger shaft.

3. A tamping machine comprising a carriage having a curved track upon oneend, a supporting plate pivoted at one end upon the track and slidably mounted at its other end upon said track, a sleevevertically disposed upon the slidably mounted endof the plate, a plunger shaft carried therein, a lifting apparatus carried upon thebase plate, chain members operable by the lifting apparatus, studs horizontally disposed upon one side and adjacent the uppermost end of the plunger shaft, plate members having connection at their ends with said chains and arranged at spaced intervals in the lengths thereof for selective engagement with said studs to periodically elevate and release said studs, a tamping element carried upon the lowermost end of the plunger shaft, and means for sustaining the plunger and tamping members therei for in an elevated position while the carriage is in transit.

I In testimony whereof we afiix our signatures.

JOHN F. BRENNAN. CHARLES w. KREHERV 

